Spray gun



'May 26,- 1925.

H. G. BARTLNG SPRAY GUN Filed Nov.

Patented May 26, 1925.

uNiTED STATES iariala'rv ori-ica HOWARD G. BARTLING, OF CHICAGO,l ILLINOIS, ASSIGNOR 'IVO PEERLESS PNEUMATIC SYSTEMS, INC., OF CHICAGO, ILLINOIS, A CORPORA'IION .OF ILLINOIS.

SPRAY GUN.

Application` filed November l24%, 1922. Serial No. 603,057.

To-aZZ whom t may concern.'

Be it known that I, HOWARD G. BAR'rLiNc,

a citizen of the United States, residing at Chicago, in the county of' Cook and State of Illinois, have invented certain new and useful Improvements in `Spray Guns, of which the followingis a specification. i

This invention relates to improvements in spray guns, and has ,for its object to provide a new and improved gun in which the quality of the brush lated by changing the'nozzle orifice, and for this purpose I provide a plurality of interchangeable nozzles'having different sized orifices therethrough. j

In the accompanying drawing I vhave illus# trated one embodiment of my vinventiom'in which#- Figure l' is'- a side elevation of my improved spraygun, a portion thereof being shown in section for clearness;

Fig. 2 is afront elevation-of one of the removable nozzles; i l

Fig. 3 is a similar elevation of another nozzle; and

Fig. 4 is a vertical'section, taken on the line 1 -4t' of Fig. 3.

Like numerals refer to vlike the drawing, in which- 10 indicates a spray gun having an actuating trigger 10'8. An air supply tube 11is attached to the gun, as is a liquid supply tube 12, itbeing and liquid under pressure to the gun through the respective tubes. At the :front of the gun is constructed an air duct 10b, throu h which. projects vthe liquid duct 10c, the flow of liquid therethrough being normally. cut ofi by the slide valve 10d. The end of the air gun is provided with aplurality of air elements in passages 10X leading to an airchamber 13av in the cap 13 fromv the air duct 10". The

ends of the liquid duct projects into the cap', and is engager ing tends .i "i of the valve 10d.

ent by the apertured tip 14 containrpered aperture, through which eX- let concentric therewith, 'and in the 13 is threaded the nozzle 16 or jet may be regu-v customary to supply airalso threaded at its extremity for,

e needle valve 1-0-' iormed as a con-v te airchamber 13a is continued around 16a surrounding the dis- 4charge extremity of the tube 14. The cap is provided with projecting horns 13b, which carry' angularly formed air ducts 13C from the air lchamber 13a, the function of these ducts being to flatten the spray stream, as is well known inthe art. j

The nozzles 16 are each provided with an enlarged knurled periphery 1Gb for ready engagement by the fingers of the operator. In Figs. 2 and 3 I have illustrated two of the nozzles having different sized orifices.

In practice,`when a batch of paint or varnish is replaced, it frequently happens that there is a variation in consistency, and this variation may perccptibly and seriously affect the quality or character of the brush or spray obtained. Previouslyrit has been necessary 4for the operator to alter the consistency of ,the batch toovercome leading H this objection, or in some instances a di'erf sary to change the nozzle 16 to provide a different sized orifice. It will be obvious tliatwhen the substituted orifice is of lesser diameter the amount of air passing through the ducts 13c will be increased, with a consequent variationv in flattening of the jet. Likewise when a larger'orifice is substituted less flattening air will flow, decreasing the flattening effect upon the spray. In this manner the character or quality of the brush or jet may be readilyvaried without materially affecting the quality of air used, landwith easy and relatively small consumption of 'the operatorstime.

I do not wish to berestricted to the specic form or character of my invention described in the above specification and embodied in the accompanying drawing, save as defined in the appended claims.

I claim 1. In combination in a spray gun, having a main air passage duct and iary flattening air ducts, movable nozzle member having an orifice therethrough 'and engageable with said ca a cap auxilsaidL orifice forming an voutlet for said main and an easily rehaving a main air discharge duct,' the cap being formed With projecting portions) auxiliary singularly formed air ducts in said portions leading from said discharge duct and constructed vto deliver attening jets upon air discharging from said main duct,

and an easily removable nozzle member enfor Said main discharge 'ct In testimony whereof, I have subscribed my name.

HOWARD G. BARTLING. 

